| DEM | REP | |
|---|---|---|
| Counties | R. Keith Roark | Lawrence G. Wasden |
| Ada | 49,820 | 52,936 |
| Adams | 539 | 972 |
| Bannock | 11,911 | 12,457 |
| Bear Lake | 677 | 1,665 |
| Benewah | 1,586 | 1,469 |
| Bingham | 3,723 | 8,397 |
| Blaine | 4,418 | 1,780 |
| Boise | 1,100 | 1,471 |
| Bonner | 4,888 | 5,333 |
| Bonneville | 8,491 | 19,637 |
| Boundary | 1,035 | 1,591 |
| Butte | 428 | 829 |
| Camas | 164 | 235 |
| Canyon | 12,851 | 23,343 |
| Caribou | 776 | 1,689 |
| Cassia | 1,729 | 4,163 |
| Clark | 70 | 224 |
| Clearwater | 1,391 | 1,553 |
| Custer | 516 | 1,185 |
| Elmore | 2,264 | 2,826 |
| Franklin | 635 | 2,514 |
| Fremont | 880 | 3,003 |
| Gem | 1,999 | 3,109 |
| Gooding | 1,771 | 2,255 |
| Idaho | 2,052 | 4,038 |
| Jefferson | 1,313 | 5,276 |
| Jerome | 1,672 | 2,841 |
| Kootenai | 13,253 | 17,599 |
| Latah | 6,365 | 4,707 |
| Lemhi | 963 | 2,345 |
| Lewis | 613 | 711 |
| Lincoln | 588 | 738 |
| Madison | 1,182 | 5,826 |
| Minidoka | 1,987 | 3,207 |
| Nez Perce | 6,422 | 5,682 |
| Oneida | 309 | 920 |
| Owyhee | 795 | 1,792 |
| Payette | 1,992 | 3,422 |
| Power | 972 | 1,240 |
| Shoshone | 2,485 | 1,528 |
| Teton | 973 | 1,251 |
| Twin Falls | 7,175 | 10,387 |
| Valley | 1,536 | 1,656 |
| Washington | 1,044 | 2,049 |
| TOTAL | 167,353 | 231,851 |
| Plurality | 64,498 | |
| Percentage | 41.9% | 58.1% |